#include<stdio.h>
int main(void)
{
	int n, delight = 0;
	printf("Please input a number\n");
	scanf_s("%d", &n);
	printf("the n is %d\n", n);
	do
	{
		n /= 10;
		delight++;
	} while (n > 0);
	printf("%d", delight);

	return 0;
}